Parallel processing methods in Geographic Information Systems (GIS) are traditionally used to accelerate the calculation of large data volumes with sophisticated spatial algorithms. Such kinds of acceleration can also be applied to provide real-time GIS applications to improve the responsiveness of user interactions with the data. This paper presents a method to enable this approach for Web GIS...

Building datasets (e.g. footprints in OpenStreetMap and 3D city models) are becoming increasingly available worldwide. However, the thematic (attribute) aspect is not always given attention, as many of such datasets are lacking in completeness of attributes. A prominent attribute of buildings is the year of construction, which is useful for some applications, but its availability may be scarce....

tllo~~glit as t l ~ r transitional approac.Il for 3D GIs tlcvrlA ker71cl systcrrl lulvich can s~tpport .?-dime7lsio~~r~l (11)plicntio7rs of G I s is plaposed. Internnlly. s1)atiol rlr~trt arc ntc~~laged by o 2-rlimensionc~l dnta stn~ctule. sincc 7rlost of the yrc~ct'icfll G I s datcl clrr: 8-r~irrrerf,siorlr~~. 1 7 1 fnnrrntion (tbo7tt the 2-r~xis, i.e. dir.ection of Ir.ci!lht, is scpn7,atcrl f...

Siyka Zlatanova ITC, 7500 AA P.O. Box 6, Enschede, the Netherlands [email protected] Summary An increasing need for a 3D GIS is observed in many areas in the last several years that challenges researchers and vendors to find a solution for maintenance and analysis of 3D data. Advances in the field of software and hardware development warranty the "luxury" to operate with the third dimension. Bas...

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Geographic Information Systems (GIS) have been designed in accordance with the way people have conceptualized space (Freundschuh & Egenhofer, 1997). While the reality is tridimensional in nature, paradoxically, its representation has been for long decades dominated by the metaphor of the paper map. This has resulted to two separate models: 2D GIS models and Digital Terrain Models (DTM). “The th...

Managing oceanographic data with traditional geographical information systems (GIS) is a difficult task because these systems have been primarily designed for land-based applications. The main problem is that the nature of objects at sea is completely different from the nature of objects found on the land: at sea most objects are represented by unconnected points that can have threedimensional ...

Three-dimensional modeling of geological bodies is a useful tool for multiple applications. Such tasks are usually accomplished starting from fieldcollected data, which typically suffer from intrinsic limitations such as accessibility constraints and punctuality of data collected. In this work, we explore the reliability of photo-geological mapping from interpretation of aerial photographs in p...